Getting fed up with that boring black font color on your iPod? Now you can get in there and change the menu text, title bar or secondary to a bright red color (or any other of your choice) that's sure to set you apart from all those me-too fanboys.
It's done by hacking into the iPod's firmware using a little application called iPodWizard (iPW), which you can download here. Once you've done that, it looks pretty easy to change that color
Open iPW, load your firmware. Go to Layout, scroll down to Font Types. In that list, go down to item 24223, which is the titlebar string. Now look at the z2 tag. It should say 0xFF000000. We're going to change that. Click on it so that the cursor goes into the hex field and highlights the first character in the series of hex, which should at the moment say 00 00 00 FF. Ignore the FF at the end, and change the first three digit series from 00 00 00 to DD 00 00. Write [to] your iPod, eject, and look. Your titlebar text is now red!
You can also change the iPod's font sizes, but be careful, this could get a little tricky. – Charlie White
Yeah, there's been a few threads about this.
It's a great app, but you have to be careful with editing the strings, like changing text, because adding or subtracting the amount of characters used has screwed up some iPods in the past.
Changing fonts is not as hard, and more recent versions of iPW have made it easier to do it. I've changed the Do Not Disconnect logo and applied themes in the past.